Steam-generator.



No. 689,49l. Patented Dec. 24, I90l; w. nonnssv, n. ROBERTS & 0. JAMES. STEAM GENERATOR.

(Application filed Mar. 29, 1901.)

(No Model.) 2 Sheets-Sheet I.

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gh/fl 127 mhm \QMLARMQS @mmy rm: nonms FEYERS co 1010147040., wnsmuofon n c Patented Dec. 24, I90I. W. HORNSBY, D. ROBERTS & 0. JAMES.

STEAM GENERATOR.

(Application filed Mar. 29, 1901-) (No Model.) 2 Sheets'-Sheet 2.

. n J :fl ,n v w w m m M 0 F. QILIMW m 0 F A H. @WOMOMOMOwfi w IIIII'IIII In'vcnfvrs witnesses UNITED STATES WILLIAM HORNSBY,

PATENT OFFICE.-

DAVID ROBERTS, AND CHARLES JAMES, on GRANTHAM, ENGLAND.

STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 689,491, dated December 24, 1991.

Application filed March 29,1901. Serial No. 53,505. (No model.) I

T0 at whom, it may concern:

Be it known that we, WILLIAM HoRNsBY,

DAVID Romans, and CHARLES JAMES, substeam generators of the water tube type,

wherein a series of straight,inclined,or curved tubes is arranged over upper and lower fur-.

naces and suitably connected at either or both ends to the steam and water drum, and has forits object to obtain greater area of passageway and better circulation of the steam and water between the tubes and the steam and water drum than is usual, this being effected by making the upper front header immediately under the steam-drum and the pocket which is riveted to the steam-drum wider than is usual, so as to take two rows of nipples.

The invention has also for its object to obtain greater freedom of expansion in the tubes immediately over both the upper and lower furnaces. To insure this in the case of the two or three bottom rows of tubes over the upper furnace,we use two back headers. The said two or three bottom rows of tubes are connected to the lower back header and the remainder to the upper back header. The lower back header and the upper back header are each connected to their own mud-drums and are in turn connected by long nipples to a pocketriveted on the under side of the back end of the steam-drum. The tubes immediately over the lower furnace are connected to front and back headers in the usual way. The back headerof these tubes is connected by long nipples to a pocket riveted on the under side of the rear end of the steam-drum, this construction allowing of great freedom of expansion for the said tubes.

To enable the invention to be fully uuderstood, we will describe it by reference to the accompanying drawings, in which Figure. 1 is a sectional elevation of a steamgenerator having the improvements applied thereto. Fig. 2 is a cross-section on the line 2 2, Fig. 1. Fig. 3 is a cross-section on the line 3 3, Fig. 1; and Fig. 4 is a front elevation of the steam-generator.

a is the upper furnace, having the ash-pit b, and c is the lower furnace, having the ashsteam-drum e,the said header being connectedto the pocket h, fittedto'the under side of the drum e by means of the two rows of nipples t '5, both pocket It and header g being made wider than usual, so as to take the two rows of nipples.

j is the upper back header,to which the majority of the tubes f are connected, and his the lower back header, to which the two or three bottom'rows of tubes f are connected.

Z is the Inud-drum,to which the upper back header j is connected by the nipples m, the said mud-drum being also connected to the pocket n on the under side of the steam-drum e by the long nipples 0 o.

p is the mud-drum,to which the lower back header is connected bythe nipples q, and which is also connected to the pocket n by the long nipples r.

s s are the tubes,arrangedimmediately over the lower furnace c, the said tubes being connected to the front headert and the back header and mud drum u. The front header is connected by the tubes 4) v to the bottom of the front header g, and the back header u is connected to the steam-drum e by the long nipples w w.

By constructing steam generators as above described We obtain a larger area of passagewayand better circulation of the steam and water between the tubes and the steam and water drum than has heretofore been possible, and, furthermore, the arrangement of the two back headers and mud-drums connected there to by nipples allows of greater freedom of excertained the nature of our said invention and in what manner the same is to be performed, We declare that whatwe claim is- 1. In a steam-generator, the combination with the steam-drum, of a water-tube section having a single header at one end and at the other end two headers located one above the other and independent connections extending from said headers directly to said steam-drum, substantially as described.

2. In a steam-generator, the combination with the steam-drum, of a water-tube section comprising a single front header, two rear headers, located one above the other, Watertubes connected to said front header, a portion of said tubes being connected to the upper rear header and a portion to the lower rear header, a connection between the front per rear header and a portion to the lower.

rear header, a separate mud-drum for each of said rear headers, connections between the front header and the steam-drum and separate connections from each of said mud-drums to the steam-drum, substantially as described. 4:. In a steam-generator, the combination with the steam-drum, of a water-tube section comprising a single front header, two rear headers located one above the other and water-tubes connected to the front header, a portion of said tubes being" connected to the upper rear header and a portion to the lower rear header, a separate mud-drum for each of said rear headers, connections between the front header and the steam-drum, separate connections from each of said mud-drums to the steam-drum, a furnace below said watertube section, a lower water-tube section below said furnace provided with a header connected with the upper water-tube section and a mud-drum directly connected to the steamdrum and a lower furnace below said lower water-tn be section,substantially as described.

WILLIAM HORNSBY. DAVID ROBERTS. CHARLES JAMES.

Witnesses:

SAMUEL WILLIAM PAYNE, ROBERT ABLEWHITE BROWN. 

